However, in a new interview with the Hollywoodreporter.com, Murphy has said he regrets speaking out in the way he did.

"I didn't speak with as much clarity as I would have liked," he said. "Who am I to say 'Fuck you?' That's not what I meant. I completely understand when artists don't want a show or another artist to interpret their songs.

He added: "I respect that. It's their personal work and I'd feel the same way. We get turned down all the time and I've don't fight it or even go back after a rejection."

"I've never felt that if you don't give Glee your music, there's something diabolical about you," Murphy said. "I think Kings Of Leon are cool as shit. The Foo Fighters are brilliant. We'd love to do one if their songs, if they were ever interested. But if it's not their thing, then OK."

Murphy also revealed that the show's bosses had approached Bjork to use one of her songs in a future episode, but that the singer had read the episode's script and declined the offer.